air/fuel ratio controller

The Dresser-Rand Reliable, Intelligent, Enginuity?, Engine
and Emissions (RELi E3) air-fuel ratio control (AFRC) is one of
the most innovative and comprehensive AFRC systems
available for carbureted, four stroke, natural gas reciprocating
engines. The RELi E? control applies a holistic systems
approach to keep your engine?s emissions precisely
controlled. Closed-loop air-fuel ratio control is dictated by the
post-catalyst oxygen (O?) sensor, providing dependable
regulation of engine emissions. System controls based on
pre-catalyst O? sensors alone do not provide a true indication
of emissions, which is why the automotive industry
abandoned pre-catalyst control years ago. The RELi E?
systems also use speed inputs, manifold air temperatures
and manifold air pressures to provide a surrogate load
calculation, which is fed back into the system algorithms for
ensured AFR control at all process conditions. Furthermore,
the system monitors catalyst conditions and detects misfires
to protect your catalyst from premature damage. Lastly, the
RELi E? AFRC employs new sensor technologies and control
algorithms to help ensure that your engine remains in control
in all operating scenarios.